/*
 * Copyright 2017-2019 original authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.micronaut.http.client;

import java.util.Optional;

/**
 * A resolver of {@link LoadBalancer} instances that are capable of resolving references to services into a concrete loadbalance.
 *
 * @author Graeme Rocher
 * @since 1.0
 */
public interface LoadBalancerResolver {

    /**
     * Resolve a {@link LoadBalancer} for the given references.
     *
     * @param serviceReferences The references. These could be service IDs or fully HTTP URLs
     * @return A {@link LoadBalancer} or empty of non can be resolved
     */
    Optional<? extends LoadBalancer> resolve(String... serviceReferences);
}
